280 



ANATOMY FOR NURSES 



[Chap. XIV 



Tonsils 



Tongue 



Salivary 

 Glands 



Teeth 



Pharynx 



Function 



Collections of lymph nodules occupy triangular space 

 between palatine arches on either side of throat. 



1. May be a source of lymphocytes and leu- 

 cocytes. 



2. May act as a filter and prevent entrance of 

 microorganisms. 



■ Special organ of sense of taste. 



. . . . (I. Stimulates secretion of digestive juices. 



Assists m „ . . ^ . ... ° ' 



,. ,. < 2. Assists in swallowing, 



digestion „ a + 



I 3. Secretes mucus. 



Parotid — just under and in front of ear. 

 Submaxil- \ 



lary > Below the jaw and under the tongue. 



Sublingual J 

 Function — Form a secretion, that mixed with that of the 



mouth is called saUva. 

 Contained in sockets of alveolar processes of maxillae and 



mandible. 

 Gums — cover processes and extend into sockets. 

 Sockets — lined with perios- j Attaches teeth to sockets, 

 teum \ Source of nourishment. 



Root — one or more fangs contained in 



socket. 

 Crown — projects beyond level of gums. 

 Neck — portion between root and crown. 

 Gives shape. 



Encloses pulp cavity which con- 

 tains nerves and blood-vessels, 

 that enter by canal from root. 

 Enamel — Caps the crown. 

 Cement — Covers the root. 

 1. Temporary — r Incisors 8 

 7 months to < Canines 4 

 2i yrs. I Molars 8 



Incisors 8 

 Canines 4 

 Premolars 8 

 Molars 12 



Function — To assist in the process of mastication. 

 Funnel-shaped bag, A^ inches long, between mouth and 



oesophagus. 

 Muscular and lined with mucous membrane. 



1 fauces. 



2 posterior nares. 

 2 Eustachian tubes. 

 1 larynx. 

 1 oesophagus. 



3 portions 



Composed 

 of three 

 substances 

 developed 

 from epi- 

 thelium 



2 sets 



Dentine • 



2. 



Permanent — 6 

 yrs. to 21 yrs. 

 of age 



20. 



32. 



7 apertures " 



